Howard Tracy Hall, 1919-2008.
The full online version of the book that came out in 2012:Part 1: Ancestry (up to page 135 of the book).Part 2: Personal Life (up to page 421 of the book).Part 3: Professional Life (through to the end, which is on page 575).

Tracy's words, from page one of his research journal: "Last week I visited with Air Force and Commerce Department officials in Washington to obtain a clarification as to the scope of the secrecy order on the G.E. Patent applications. I was told that it applied only to those applications and that I could freely and openly use any new apparatus that I might devise. On this basis I am going ahead with some new ideas that I have . . ." Follow along as another high pressure press capable of synthesizing diamond is developed, find when Tracy first thought of 'diamond growth from powder (PCD)', and read about it in Tracy's own words and scientific notes.

Part 1: Up to page 237 of the book.Part 2: Page 238 through to the end of the book, which is on page 499.